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If the hdd pcb is damaged or burnt, need to replace it with the
same model of pcb to make the hdd work.
1. For WD hdd, need to check the number on the pcb and the main
chip.
The number of pcb is 2060-701292-000 REV A
The number of pcb is 2060-701335-003 REV B
The number of main chip is 88i6540-LFH
The number of main chip is 88i6545-TFJ1
For WD hdd, the ROM chip stores the firmware of the hdd
(firmware for hdd is like operating system for computer),
you need to change the ROM chip from
original board to the replacement board, in order to make the
replacement board compatible with your HDD.
For some new models of WD pcb (ROYL Series), it has no independent ROM chip,
the firmware is inside the main chip, need some tools to read it
from the original pcb and write to the
replacement board,
or swap the main chip.
2. For Maxtor hdd, need to check the number of main chip.
The number of main chip is 040111300
The number of main chip is 040125400
Most Maxtor hdd no need to replace the ROM chip, some needs.
3. For Seagate hdd, need to check the number of pcb and main
chip.
The number of pcb is 100466725 REV A
The number of pcb is 100422559 REV B
The number of main chip is 0750T 6727517
The number of main chip is 100367028
For Seagate hdd, also need to replace the ROM chip on pcb. Some
models of pcb have no ROM chip, the firmware is stored in the
main chip.
Hot air rework station
Use hot air rework station to remove the ROM (BIOS) chip from
the original pcb.
The ROM (BIOS) chip is removed.
Solder the ROM (BIOS) chip on the Replacement pcb.
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